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path: root/app/app.tsx
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/**
 * Welcome to the main entry point of the app. In this file, we'll
 * be kicking off our app.
 *
 * Most of this file is boilerplate and you shouldn't need to modify
 * it very often. But take some time to look through and understand
 * what is going on here.
 *
 * The app navigation resides in ./app/navigators, so head over there
 * if you're interested in adding screens and navigators.
 */
import './i18n'
import './utils/ignore-warnings'
import React, { useState, useEffect, useRef } from 'react'
import { NavigationContainerRef } from '@react-navigation/native'
import {
  SafeAreaProvider,
  initialWindowMetrics,
} from 'react-native-safe-area-context'
import { initFonts } from './theme/fonts' // expo
import * as storage from './utils/storage'
import {
  useBackButtonHandler,
  RootNavigator,
  canExit,
  setRootNavigation,
  useNavigationPersistence,
} from './navigators'
import { RootStore, RootStoreProvider, setupRootStore } from './models'
import { ToggleStorybook } from '../storybook/toggle-storybook'

// This puts screens in a native ViewController or Activity. If you want fully native
// stack navigation, use `createNativeStackNavigator` in place of `createStackNavigator`:
// https://github.com/kmagiera/react-native-screens#using-native-stack-navigator
import { enableScreens } from 'react-native-screens'
enableScreens()

export const NAVIGATION_PERSISTENCE_KEY = 'NAVIGATION_STATE'

/**
 * This is the root component of our app.
 */
function App() {
  const navigationRef = useRef<NavigationContainerRef>(null)
  const [rootStore, setRootStore] = useState<RootStore | undefined>(undefined)

  setRootNavigation(navigationRef)
  useBackButtonHandler(navigationRef, canExit)
  const {
    initialNavigationState,
    onNavigationStateChange,
  } = useNavigationPersistence(storage, NAVIGATION_PERSISTENCE_KEY)

  // Kick off initial async loading actions, like loading fonts and RootStore
  useEffect(() => {
    ;(async () => {
      await initFonts() // expo
      setupRootStore().then(setRootStore)
    })()
  }, [])

  // Before we show the app, we have to wait for our state to be ready.
  // In the meantime, don't render anything. This will be the background
  // color set in native by rootView's background color. You can replace
  // with your own loading component if you wish.
  if (!rootStore) return null

  // otherwise, we're ready to render the app
  return (
    <ToggleStorybook>
      <RootStoreProvider value={rootStore}>
        <SafeAreaProvider initialMetrics={initialWindowMetrics}>
          <RootNavigator
            ref={navigationRef}
            initialState={initialNavigationState}
            onStateChange={onNavigationStateChange}
          />
        </SafeAreaProvider>
      </RootStoreProvider>
    </ToggleStorybook>
  )
}

export default App